We have two yearlings that have a little underbite. It is silly looking, but not an issue with eating, etc. Comes from their dad's line. This year, we had a doeling form the same line born with one - big enough to make me wonder how big is too big. She is still only 3 days old and I don't know if they grow more pronounced or less. (We got the ones we have at 9 days, so don't know how severe they looked at birth.)She was born with her tongue hanging out and it still flops out sometimes. She still has a little trouble getting it under the nipple on the lambar - but eats fine from a bottle and can do lambar, but not well enough to make me really happy. I'm just wondering if I should expect this to get better or worse. If worse, we would probably want to cull her.